Henagar, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.3 °F (low) to 69 °F (high). Annual precipitation averages 58.4 Inches. Henagar is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.2 °F | 48.5 °F | 5.82 in. |
| February | 32.4 °F | 52.6 °F | 5.64 in. |
| March | 38.0 °F | 61.0 °F | 5.54 in. |
| April | 45.7 °F | 69.3 °F | 5.19 in. |
| May | 54.4 °F | 76.7 °F | 4.55 in. |
| June | 63.0 °F | 83.7 °F | 4.58 in. |
| July | 65.4 °F | 86.2 °F | 4.57 in. |
| August | 64.7 °F | 85.9 °F | 3.57 in. |
| September | 58.8 °F | 80.9 °F | 4.43 in. |
| October | 47.4 °F | 71.2 °F | 3.47 in. |
| November | 37.0 °F | 60.0 °F | 4.93 in. |
| December | 32.6 °F | 51.5 °F | 6.06 in. |
| Annual | 47.3 °F | 69 °F | 58.35 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |